Bit-stock



(No Model.)

W. J. BAYRBR.

B'IT STOCK.

Patented vlvmy, 1883.

A m51 ev'laq UNITED STATES PATENT OFFICE.

WILLIAM J. BAYRER, OF SOUIHINGTON, GNNEGTICUT.

BIT-STOCK.

SPECIFICATION forming partof Letters Patent No. 277,105, dated May 8, 1883.

Application filed March 17,1883. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM J. BAYRER, a citizen ofthe United States of America, residing a Southington, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Bit` Stocks, of which the following is a specification, reference being had therein to the accompanying drawings.

The object of my invention is to construct a bit-stock which shall be effective and easy of operation, and shall at the same time always maintain a firm grasp upon the bit; Iaccom-v plish this object by constructing the jaws of said bitjvith bent ends or extensions, which ends orY extensions cross each other near their upper extremities, and are pivotedor otherwise joined together at their point of intersection; also by other details of construction, which will be hereinafter fully set forth.

In the drawings, Figure 1 represents a side view of my invention; Fig. 2, a detail view of the core of the stock; Fig. 3, a longitudinal cross-section of my invention; Fig. 4, a detail view of-thejaws; Fig. 5, an end view ot' same, and Fig. 6 a detail view of one of the ends of the aforesaid jaw ends or extensions.

Similar letters of reference indicate corresponding parts throughout the several views.

A represents a portion of the bit-stock handle, one extremity of which is secured to the Y core B. Said core is externally threaded for a portion 'of its length, and slotted in the ordinary manner. It is also provided with beveled cross-supportsC. D is the head or shell of the bit-stock, and is constructed in the ordinary manner with internal threads and conical mouth. E are the jaws, made separate,

. beveled at their outer extremities, and providsame. In the drawings, portions f are shown out away, and the aforesaid extensions are in a manner made to dovetail together. Within the head D, and resting upon the inner ends of said extensions F, is a concave shoe, G, provided with a stem, g, about which is one end of a spiral spring, H. The main portion of said spring is contained within a cavity formed in the upper part of the core B, and the free end of same rests against the end of the handle'A.

The operation of my improved bit-stock is as follows: vrI-he lips of the jaws E being forced backward within the mouth ofthe head D necessarily forces the vupper ends of the extensions F against the concave spring-actuated shoe G. 'Ihe resistance offered by said shoe thus forces said ends apart, and the extensions being hinged or pivoted together, the jaws F are in their turn forced apart, and the tang` of the bit thus allowed to enter between said jaws. Said tang having entered to a sufticient distance within the jaws, the core B is screwed down within the head D, and the jaws thereby given a rigid hold upon the bit-tang. In removing the bit this operation is, as a matter of course, reversed.

Having thus described my invention, what I claim is- 1. In a bit-stock, the jaws E, made in two parts, the inner ends of which are made to intersect and cross each other and form shortievcrs to spread the outer ends, the two parts being held together by a joint at the place of their intersection, as shown and set forth.

2. In a bit-stock, the combination, with the jaws E, made in two parts, theirinner ends intersectin g and jointed at point of intersection, of the spring-actuated shoe G, substantiall y as and for the purposes described.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM J. BAYRER.

Witnesses:

GEORGE TERRY, LEWIS W. TURNER. 

